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Diffstat (limited to 'target/hexagon/gen_helper_funcs.py')
| -rwxr-xr-x | target/hexagon/gen_helper_funcs.py | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/target/hexagon/gen_helper_funcs.py b/target/hexagon/gen_helper_funcs.py new file mode 100755 index 0000000000..2b1c5d8e3e --- /dev/null +++ b/target/hexagon/gen_helper_funcs.py @@ -0,0 +1,220 @@ +#!/usr/bin/env python3 + +## +## Copyright(c) 2019-2021 Qualcomm Innovation Center, Inc. All Rights Reserved. +## +## This program is free software; you can redistribute it and/or modify +## it under the terms of the GNU General Public License as published by +## the Free Software Foundation; either version 2 of the License, or +## (at your option) any later version. +## +## This program is distributed in the hope that it will be useful, +## but WITHOUT ANY WARRANTY; without even the implied warranty of +## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +## GNU General Public License for more details. +## +## You should have received a copy of the GNU General Public License +## along with this program; if not, see <http://www.gnu.org/licenses/>. +## + +import sys +import re +import string +import hex_common + +## +## Helpers for gen_helper_function +## +def gen_decl_ea(f): + f.write(" uint32_t EA;\n") + +def gen_helper_return_type(f,regtype,regid,regno): + if regno > 1 : f.write(", ") + f.write("int32_t") + +def gen_helper_return_type_pair(f,regtype,regid,regno): + if regno > 1 : f.write(", ") + f.write("int64_t") + +def gen_helper_arg(f,regtype,regid,regno): + if regno > 0 : f.write(", " ) + f.write("int32_t %s%sV" % (regtype,regid)) + +def gen_helper_arg_new(f,regtype,regid,regno): + if regno >= 0 : f.write(", " ) + f.write("int32_t %s%sN" % (regtype,regid)) + +def gen_helper_arg_pair(f,regtype,regid,regno): + if regno >= 0 : f.write(", ") + f.write("int64_t %s%sV" % (regtype,regid)) + +def gen_helper_arg_opn(f,regtype,regid,i,tag): + if (hex_common.is_pair(regid)): + gen_helper_arg_pair(f,regtype,regid,i) + elif (hex_common.is_single(regid)): + if hex_common.is_old_val(regtype, regid, tag): + gen_helper_arg(f,regtype,regid,i) + elif hex_common.is_new_val(regtype, regid, tag): + gen_helper_arg_new(f,regtype,regid,i) + else: + print("Bad register parse: ",regtype,regid,toss,numregs) + else: + print("Bad register parse: ",regtype,regid,toss,numregs) + +def gen_helper_arg_imm(f,immlett): + f.write(", int32_t %s" % (hex_common.imm_name(immlett))) + +def gen_helper_dest_decl(f,regtype,regid,regno,subfield=""): + f.write(" int32_t %s%sV%s = 0;\n" % \ + (regtype,regid,subfield)) + +def gen_helper_dest_decl_pair(f,regtype,regid,regno,subfield=""): + f.write(" int64_t %s%sV%s = 0;\n" % \ + (regtype,regid,subfield)) + +def gen_helper_dest_decl_opn(f,regtype,regid,i): + if (hex_common.is_pair(regid)): + gen_helper_dest_decl_pair(f,regtype,regid,i) + elif (hex_common.is_single(regid)): + gen_helper_dest_decl(f,regtype,regid,i) + else: + print("Bad register parse: ",regtype,regid,toss,numregs) + +def gen_helper_return(f,regtype,regid,regno): + f.write(" return %s%sV;\n" % (regtype,regid)) + +def gen_helper_return_pair(f,regtype,regid,regno): + f.write(" return %s%sV;\n" % (regtype,regid)) + +def gen_helper_return_opn(f, regtype, regid, i): + if (hex_common.is_pair(regid)): + gen_helper_return_pair(f,regtype,regid,i) + elif (hex_common.is_single(regid)): + gen_helper_return(f,regtype,regid,i) + else: + print("Bad register parse: ",regtype,regid,toss,numregs) + +## +## Generate the TCG code to call the helper +## For A2_add: Rd32=add(Rs32,Rt32), { RdV=RsV+RtV;} +## We produce: +## int32_t HELPER(A2_add)(CPUHexagonState *env, int32_t RsV, int32_t RtV) +## { +## uint32_t slot __attribute__(unused)) = 4; +## int32_t RdV = 0; +## { RdV=RsV+RtV;} +## COUNT_HELPER(A2_add); +## return RdV; +## } +## +def gen_helper_function(f, tag, tagregs, tagimms): + regs = tagregs[tag] + imms = tagimms[tag] + + numresults = 0 + numscalarresults = 0 + numscalarreadwrite = 0 + for regtype,regid,toss,numregs in regs: + if (hex_common.is_written(regid)): + numresults += 1 + if (hex_common.is_scalar_reg(regtype)): + numscalarresults += 1 + if (hex_common.is_readwrite(regid)): + if (hex_common.is_scalar_reg(regtype)): + numscalarreadwrite += 1 + + if (numscalarresults > 1): + ## The helper is bogus when there is more than one result + f.write("void HELPER(%s)(CPUHexagonState *env) { BOGUS_HELPER(%s); }\n" + % (tag, tag)) + else: + ## The return type of the function is the type of the destination + ## register + i=0 + for regtype,regid,toss,numregs in regs: + if (hex_common.is_written(regid)): + if (hex_common.is_pair(regid)): + gen_helper_return_type_pair(f,regtype,regid,i) + elif (hex_common.is_single(regid)): + gen_helper_return_type(f,regtype,regid,i) + else: + print("Bad register parse: ",regtype,regid,toss,numregs) + i += 1 + + if (numscalarresults == 0): + f.write("void") + f.write(" HELPER(%s)(CPUHexagonState *env" % tag) + + i = 1 + + ## Arguments to the helper function are the source regs and immediates + for regtype,regid,toss,numregs in regs: + if (hex_common.is_read(regid)): + gen_helper_arg_opn(f,regtype,regid,i,tag) + i += 1 + for immlett,bits,immshift in imms: + gen_helper_arg_imm(f,immlett) + i += 1 + if hex_common.need_slot(tag): + if i > 0: f.write(", ") + f.write("uint32_t slot") + i += 1 + if hex_common.need_part1(tag): + if i > 0: f.write(", ") + f.write("uint32_t part1") + f.write(")\n{\n") + if (not hex_common.need_slot(tag)): + f.write(" uint32_t slot __attribute__((unused)) = 4;\n" ) + if hex_common.need_ea(tag): gen_decl_ea(f) + ## Declare the return variable + i=0 + for regtype,regid,toss,numregs in regs: + if (hex_common.is_writeonly(regid)): + gen_helper_dest_decl_opn(f,regtype,regid,i) + i += 1 + + if 'A_FPOP' in hex_common.attribdict[tag]: + f.write(' arch_fpop_start(env);\n'); + + f.write(" %s\n" % hex_common.semdict[tag]) + + if 'A_FPOP' in hex_common.attribdict[tag]: + f.write(' arch_fpop_end(env);\n'); + + ## Save/return the return variable + for regtype,regid,toss,numregs in regs: + if (hex_common.is_written(regid)): + gen_helper_return_opn(f, regtype, regid, i) + f.write("}\n\n") + ## End of the helper definition + +def main(): + hex_common.read_semantics_file(sys.argv[1]) + hex_common.read_attribs_file(sys.argv[2]) + hex_common.read_overrides_file(sys.argv[3]) + hex_common.calculate_attribs() + tagregs = hex_common.get_tagregs() + tagimms = hex_common.get_tagimms() + + with open(sys.argv[4], 'w') as f: + for tag in hex_common.tags: + ## Skip the priv instructions + if ( "A_PRIV" in hex_common.attribdict[tag] ) : + continue + ## Skip the guest instructions + if ( "A_GUEST" in hex_common.attribdict[tag] ) : + continue + ## Skip the diag instructions + if ( tag == "Y6_diag" ) : + continue + if ( tag == "Y6_diag0" ) : + continue + if ( tag == "Y6_diag1" ) : + continue + if ( hex_common.skip_qemu_helper(tag) ): + continue + + gen_helper_function(f, tag, tagregs, tagimms) + +if __name__ == "__main__": + main() |